Embedding optical fibers in metal alloys

Stefan Sandlin, Ari Hokkanen

    Research output: Contribution to journalArticleScientificpeer-review

    14 Citations (Scopus)

    Abstract

    This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.
    Original languageEnglish
    Pages (from-to)31-36
    Number of pages6
    JournalIEEE Instrumentation and Measurement Magazine
    Volume6
    Issue number2
    DOIs
    Publication statusPublished - 2003
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    nickel alloys
    Nickel alloys
    embedding
    Optical fibers
    Bragg gratings
    optical fibers
    Fiber optics
    fiber optics
    Metals
    Vacuum brazing
    gratings
    metals
    brazing
    Inconel (trademark)
    fibers
    Fibers
    Monitoring
    Thermal cycling
    Temperature
    Wavelength

    Cite this

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    title = "Embedding optical fibers in metal alloys",
    abstract = "This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.",
    author = "Stefan Sandlin and Ari Hokkanen",
    note = "Project code: H0SU00884",
    year = "2003",
    doi = "10.1109/MIM.2003.1200281",
    language = "English",
    volume = "6",
    pages = "31--36",
    journal = "IEEE Instrumentation and Measurement Magazine",
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    number = "2",

    }

    Embedding optical fibers in metal alloys. / Sandlin, Stefan; Hokkanen, Ari.

    In: IEEE Instrumentation and Measurement Magazine, Vol. 6, No. 2, 2003, p. 31-36.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Embedding optical fibers in metal alloys

    AU - Sandlin, Stefan

    AU - Hokkanen, Ari

    N1 - Project code: H0SU00884

    PY - 2003

    Y1 - 2003

    N2 - This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.

    AB - This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.

    U2 - 10.1109/MIM.2003.1200281

    DO - 10.1109/MIM.2003.1200281

    M3 - Article

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    EP - 36

    JO - IEEE Instrumentation and Measurement Magazine

    JF - IEEE Instrumentation and Measurement Magazine

    SN - 1094-6969

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